The Cenozoic volcanic activities of the volcano cluster in the Longgang ar ea of Jilin Provienc can be divided into 5 eruption stages, which are mentioned from old to young as ①Chuandishan stage, ②Xiaoyizishan stage, ③Dayizishan sta ge, ④Jinlongdingzi stage and ⑤Sihai stage. In addition, eruption types of these volcanoes were ascertained based on the study of volcanic petrographic facies of all stages.